### Key Sections:

1. **Installation**: Instructions for installing the tool globally via npm.
2. **Initial Setup**: Step-by-step guide on running the `setup` command and configuring the Postman API and GitHub details.
3. **Verify Configuration**: Command to check if the setup was successful.
4. **Usage**: Details on how to use the tool to sync Postman collections to GitHub.
5. **Configuration File**: Explanation about the location and purpose of the configuration file.
6. **License**: Placeholder for licensing information, assuming you're using an open-source license like MIT.

This should provide your users with everything they need to configure and use the `sync-postman` tool. Let me know if you'd like any more details or modifications!